Machine for repairing saws.



. Patented July 29, I902. W. TRAVIS.

MACHINE FOR REPAIRING SAWS. (Application filed Nov. 3. 1901.

'3 Sheeis-8heet I.

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Tn: "cams PE'IERS co. mmumno" WASHINGTON n c (No Model.)

Witnesses:

- No. 705,720. Patented July 29, I902.

' v W. TRAVIS.

MACHINE FOB REPAIRING SAWS.

(Application filed Nov. 8, 1901.) (No Moddl.) 3 Sheets-Sheet 2.

Patented m 29, 1902. w. TRAVIS.

MACHINE FOR REPAIRING SAWS.

(Application filed Nov. ,8, 1901.)

3 Sheets-Sheet 3.

(N0 Model.)

Witgesses:

UNITED STATES PATENT ()EEICE.

WILLIAM TRAVIS, OF LUDINGTON, MICHIGAN, ASSIGNOR OF TWO-THIRDS TO ALVAHJ. CARSON, OF KALAMAZOO, MICHIGAN.

MACHINE FOR REPAIRING SAWS.

SPECIFICATION forming part of Letters Iatent No. 705,720, dated July 29,1902.

Application filed November 8, 1901. Serial No. 81,580. (No model.)

To all whom it may concern:

Be it known that LWILLIAM TRAVIS, a citizen of the United States,residing at the city of Ludington,iu the county of Mason and State ofMichigan, have invented certain new and useful Improvements in Machinesfor Repairing Saws, of which the following is a specification. Thisinvention relates to an improved ma chine for repairing band-saws andsimilar articles.

Band-saws in use frequently crack at the edge, and after two or threecracks are formed bending of the saw and will fit very securely in placeand will adhere very securely to the saw and at the same time present.at the point of patching the full thickness of the material, whereby thestrength of the blade will not be at all impaired.

It is a further object to provide a means for repairing and fitting apatch in a band-saw or similar article in such manner that the same willnot need to be heated to such an extent as to in any way afiect thetemper.

It is also an object of this invention to provide a means for shapingthe patch and the seat of the same so that the one will exactly coincidewith the other.

Further objects will definitely appear in the detailed description tofollow.

I accomplish the objects 'of my invention by the devices and meansdescribed in this specification.

The invention is clearly defined and pointed out in the claims.

Astructure fully embodying the features of my invention is clearlyillustrated in the accompanying drawings, forming a part of thisspecification, in which-,

Figure 1 is a detail plan view of a structure embodying the features ofmy invention, a portion of a saw-blade being shown in posielevation ofthe same.

tion to be operated upon. Fig. 2 is a detail Fig. 3 is a transversesectional elevation taken on a line corresponding to line-3 3 of Figs. 1and 2. Fig. 4 is a detail Vertical sectional view taken on line 4 4 ofFigs. 2 and 7. Fig. 5 is a detail sectional view on line 5 5 of Fig. 4.Fig. 6 is an enlarged detail sectional view on line 6 6 of Figs. 1 and3. Fig. 7 is an enlarged detail sectional view on line 7 7 of Figs. 1and 3. Fig. Sis a detail sectional view on line 8 8 of Fig. 7. Fig. 9 isa detail plan view of the saw-blade in which the seat has been properlyformed. Fig. 10' is a sectional view on line 10 10 of Fig. 9, the patchbeing shown a little separated from the blade, but showing the manner inwhich the same fits within the seat. 7

In the drawings all of the sectional views are taken looking in thedirection of the little arrows at the ends of the section-lines, andsimilar letters of reference refer to similar parts throughout theseveral views.

Referring to the lettered parts of the drawings, A is the frame,whichcarries the grinding mechanism for forming the seat for the patchand for shaping the patch. This is preferably supported on suitabletrunnions e e in'bearings or brackets E E, which are supported on thebase-plate or table Q. i This frame is secure in this manner so that itmay be properly adjusted to the work to be performed and also for thefurther purpose that it may be swung up out of the Way when not in use.The shaft D is supported in suitable bearings and is driven by tight andloose pulleys D thereon. The driving-shaft is in line with the trunnionse e, which support the main frame A. AshaftB extends out from the mainframe and carries on its outerend an emery or other grinding wheel. Anelongated pulley B is on the shaft B, and this receives the drivingbeltG, which passes around the guide-pul ley G, which changes the directionof the same to the band-wheel F on the shaft D. The guide pulley G is onan adjustable bracket G, which is made adjustable by being suitablyslotted and receiving through the slot at set-boltb. The shaft B is inthe plane of the trunnions which support the frame A. Consequently theframe can be raised or lowered without changing the tension on the beltG. A lever O is pivoted by the bolt (1. to an arm J, extending out fromthe frame, and has forks O at its inner end, the forks being slotted toengage pins on a collar B, which is secured to the shaft B, whereby bythe manipulation of this lever the shaft B is moved back and forthlengthwise in its bearings, thereby moving the grinding-wheel H back andforth in the direction of its axis. The handle J is secured to the arm J(see right of Fig. 1) and has means for controlling the elevation of thegrinding wheel. On the screw J, which is provided with hand-wheel J andwhich is adapted to rest against the top of the table Q, is a stop bythe adjustment of which the position to which grinding-wheel H candescend is controlled by controlling the height of the frame.

The saw-blade is placed on the table with the crack in line with thegrinding-wheel. The frame is lowered to the proper position, and

by the manipulation of the lever C after the grinder is set in motion acurved seat is ground in the saw-blade opposite the crack, as clearlyappears in Figs. 9 and 10, and this is to receive the patch of exactlycorresponding shape, as seen in Fig. 10,which is then brazed inposition. The patch is also formed by this machine, a rock-shaft N beingprovided above the main shaft B and in suitable vertically-adjustedsupports. The rock=shaf t N is supported by an arm K, extending from thebracket K, which is adjustable up and down on the rod or bolt I, whichis supported by a suitable lug I on the main frame of the machine. Aspring I holds the bracket K normally upward. The shaft N is adapted toslide back and forth in its bearings K K. On each end of the shaft is abracket L, provided with a vertically-adjustable slide L, which isadjustable up and down by means of a hand-wheel M, which is mounted in asuitable bearing and has a screw M, which engages said slide L andadjusts it up and down. A bar P is supported in the lower end of theslides, being retained adjustably in position by suitable set-screws.This bar P is downwardly and rearwardly curved at its front end, thesame being adapted to be clamped by a suitable screw therefor. A slidingclamp P is on the bar P and adapted to be adjusted back and forth on thesame. These clamps are to hold a strip of steel R, which is preferably astrip of saw-blade. It will be seen that this bar P projects out overthe grinding-wheel H and by rocking the bar P, which is possible owingto the shaft N being supported in bearings K K, it will be seen that theunder surfaces of the strip of steel R will be ground off in the arc ofa cylinder, and by adjusting the slides L up and down the same can bemade of any thickness and of any size desired and the arc of the circlecan be of any diameter desired, and can thus be made to exactlycorrespond to the circular seat formed in the saw-blade It byreciprocating the grinding- Wheel in the direction of its axis over thesame. The markings of the grinding-wheel will be in the direction of thelength of the saw in each instance, and consequently there hold theparts in a satisfactory manner, and

the passing of the saw over the Wheel will not tend to loosen the same.

I have described my invention in its preferred form; but I desire toremark that the same can be greatly varied in its details withoutdeparting from my invention.

The machine might be made use of to form seats for the patches in theside of the blade, and the patches can be formed by other means; but itis obvious that by combining the whole structure the patch and the seatfor the patch can be made at the same time by the same operator and thesingle reciprocation of the grinding-wheel will form the patch and alsothe seat for the patch at the same time. I also desire to remark in thisconnection that it is not essential that the shaft N be adapted to slidethrough the bearings K K, though this is of advantage, as it enables theoperator to bring the patch ox actly to the desired position over thegrinding-wheel H, so that the particular part of the strip of steel Rfor the patch which it it is desired to shape will be acted upon by theWheel while it is being reciprocated to cut the seat for the patch bythe saw beneath. Of course this patch can be formed separately from theoperation of cutting the seat for it in the saw; but it will obviouslytake twice as long to do the work in that way, and by the particulararrangement I have adopted it is possible to shape the patch and formthe seat by the same grinding-wheel at the same operation.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-=- 1. In a machine of the class described,the combination of a table Q; a driving-shaft D supported in suitablebearings thereon; a frame A supported on trunnions in line with the saidshaft D; a shaft B at right angles to the said trunnions and supportedin suitable bearings on the frame A and adapted to re-,

ciprocate in said bearings; an elongated pulley B on the said shaft; adriving-belt G from the driving-pulley F on the drivingshaft to saidpulley B; a shipper-lever connected to said shaft by a suitable collar Bto reciprocate the same; an adjustable screw top J in the frame A forregulating the height of the frame; a rook-shaft N supported in suitablebearings above the shaft B; brackets on the shaft with adjustable slidestherein; a bar P carried by the said adjustable slides and extendingforwardly and provided with a clamp to retain a strip of steel to form apatch for a saw, coacting for the purpose specified. r

2. In a machine of the class described, the combination of a table Q; adriving-shaft D supported in suitable bearings thereon; a frame Asupported on trunnions in line with the said shaftD; a shaft B at rightangles to the said trunnions and supported in suitable bearings on theframe A and adapted to reciprocate in said bearings; an elongated pulleyB on the said shaft; a driving-bolt G" from the driving-pulley F on thedrivingshaft to said pulley B 5 a shipper-lever connected to said shaftby a suitable collar B to reciprocate the same; an adjustable screwstopJ in the frameA for regulating the height 7 of the frame, coactingforthe purpose speci- 3. In a saw-repairing machine, the combisaidtrunnions adapted to reciprocate back and forth in its bearings; agrinding-wheel on the end of said shaft and means for controlling theelevation of the same whereby'a same can be swung back and forth and beground in the arc of the circle in said grinding-wheel, for the purposespecified.

In witness whereof I have hereunto set my hand and seal in the presenceof two witnesscs.

WILLIAM TRAVIS. [11. 8.]

Witnesses ALEX PELLETIER, EMMET PELLETIERi

